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Understanding nanocellulose chirality and structure–properties relationship at the single fibril level

Author

Listed:
  • Ivan Usov

    (ETH Zurich)

  • Gustav Nyström

    (ETH Zurich)

  • Jozef Adamcik

    (ETH Zurich)

  • Stephan Handschin

    (ETH Zurich)

  • Christina Schütz

    (Stockholm University
    Wallenberg Wood Science Center, KTH)

  • Andreas Fall

    (Stockholm University)

  • Lennart Bergström

    (Stockholm University)

  • Raffaele Mezzenga

    (ETH Zurich)

Abstract

Nanocellulose fibrils are ubiquitous in nature and nanotechnologies but their mesoscopic structural assembly is not yet fully understood. Here we study the structural features of rod-like cellulose nanoparticles on a single particle level, by applying statistical polymer physics concepts on electron and atomic force microscopy images, and we assess their physical properties via quantitative nanomechanical mapping. We show evidence of right-handed chirality, observed on both bundles and on single fibrils. Statistical analysis of contours from microscopy images shows a non-Gaussian kink angle distribution. This is inconsistent with a structure consisting of alternating amorphous and crystalline domains along the contour and supports process-induced kink formation. The intrinsic mechanical properties of nanocellulose are extracted from nanoindentation and persistence length method for transversal and longitudinal directions, respectively. The structural analysis is pushed to the level of single cellulose polymer chains, and their smallest associated unit with a proposed 2 × 2 chain-packing arrangement.

Suggested Citation

  • Ivan Usov & Gustav Nyström & Jozef Adamcik & Stephan Handschin & Christina Schütz & Andreas Fall & Lennart Bergström & Raffaele Mezzenga, 2015. "Understanding nanocellulose chirality and structure–properties relationship at the single fibril level," Nature Communications, Nature, vol. 6(1), pages 1-11, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8564
    DOI: 10.1038/ncomms8564
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    Cited by:

    1. Hamed Almohammadi & Sayyed Ahmad Khadem & Massimo Bagnani & Alejandro D. Rey & Raffaele Mezzenga, 2022. "Shape and structural relaxation of colloidal tactoids," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Thomas G. Parton & Richard M. Parker & Gea T. Kerkhof & Aurimas Narkevicius & Johannes S. Haataja & Bruno Frka-Petesic & Silvia Vignolini, 2022. "Chiral self-assembly of cellulose nanocrystals is driven by crystallite bundles," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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